1. Suppuration in the Petrous Pyramid;Lindsay J. R.;Annals of Otology, Rhinology and Laryngology,1938
2. Surgical Treatment of Suppurative Petrositis: A Critique;Kopetzky S. J.;Archives of Otolaryngology,1937
3. Suppuration of the Petrous Pyramid: Surgical Therapy;Kopetzky S. J.;Annals of Otology, Rhinology and Laryngology,1931
4. Complete Apicectomy (Mastoidotympanoapicectomy);Lempert J.;Archives of Otolaryngology,1937
5. R.Lund: “The Indications for the Labyrinth Operation with Special Reference to Acute Diffuse Suppurative Labyrinthitis” The Journal of Laryngology and Otology July 1936 page425.